i'm susan hendricks filling in for randi kaye. it's half past the hour. >>> egypt is detaining a well known jihadist. the fbi wants to know what role he played in the deaths of four americans that night in libya. here now is susan candiotti. >> susan, good morning. investigators have had this man on the radar for some time and now he's being callinged a possible suspect in the benghazi attack. mohammed abu ahmed was arrested a couple of weeks ago and remains in custody while the investigation goes on. u.s. authorities believe he may have been involved in the september 11th terrorist hit that killed chris stevens and three other americans according to a u.s. official. the fbi which is conducting the investigation hasn't had access to abu ahmed. he's known as a radical jihadist, 45 years old, master's degree in shari'a lie. he's known to be working with another group. officials say he has denied any connection to the attack on the u.s. consulate or being affiliated with al qaeda. he's also believed to be connected to a heavily armed